@import url('https://fonts.googleapis.com/css2?family=Noto+Sans:wght@400;700&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans', sans-serif;
    background: linear-gradient(135deg, #031c26 0%, #247c6d 100%);
    min-height: 100vh;
    color: #031c26;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    text-align: center;
    margin-bottom: 30px;
    color: #F2F0EF;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(3,28,38,0.3);
}

header p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 15px;
}

.library-info {
    background: rgba(255, 255, 255, 0.1);
    padding: 15px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.library-info p {
    margin: 0;
    font-size: 0.95rem;
    opacity: 0.9;
}

.admin-link {
    margin-top: 15px;
}

.admin-link .btn {
    font-size: 0.9rem;
    padding: 8px 16px;
}

/* Floor Navigation */
.floor-nav {
    background: #F2F0EF;
    border-radius: 15px;
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: 0 5px 15px rgba(3,28,38,0.1);
}

.floor-nav h3 {
    margin-bottom: 15px;
    color: #031c26;
    font-size: 1.2rem;
}

.floor-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 15px;
}

.floor-btn {
    background: linear-gradient(135deg, #031c26 0%, #247c6d 100%);
    color: #F2F0EF;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.floor-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(3, 28, 38, 0.2);
}

.floor-btn.active {
    background: linear-gradient(135deg, #247c6d 0%, #031c26 100%);
    box-shadow: 0 3px 10px rgba(3, 28, 38, 0.3);
}

.floor-info {
    background: #e8f4f8;
    padding: 15px;
    border-radius: 8px;
    border-left: 4px solid #247c6d;
}

.floor-info p {
    margin: 0;
    font-size: 0.9rem;
    color: #2d3748;
}

/* Room Grid */
.room-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    flex: 1;
}

.room-card {
    background: #F2F0EF;
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 10px 30px rgba(3,28,38,0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-left: 5px solid #247c6d;
}

.room-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(3,28,38,0.15);
}

.room-card.available {
    border-left-color: #48bb78;
}

.room-card.occupied {
    border-left-color: #f56565;
}

.room-card.booked {
    border-left-color: #ed8936;
}

.room-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.room-name {
    font-size: 1.3rem;
    font-weight: 700;
    color: #031c26;
}

.room-status {
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
}

.room-status.available {
    background: #c6f6d5;
    color: #22543d;
}

.room-status.occupied {
    background: #fed7d7;
    color: #c53030;
}

.room-status.booked {
    background: #feebc8;
    color: #c05621;
}

.room-details {
    margin-bottom: 20px;
}

.room-detail {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.room-detail .icon {
    font-size: 1.1rem;
    width: 20px;
}

.room-equipment {
    background: #e2e8f0;
    padding: 10px;
    border-radius: 8px;
    font-size: 0.9rem;
    color: #4a5568;
    margin-bottom: 15px;
}

.book-btn {
    background: linear-gradient(135deg, #031c26 0%, #247c6d 100%);
    color: #F2F0EF;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
}

.book-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(3, 28, 38, 0.18);
}

.book-btn:disabled {
    background: #a0aec0;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(3, 28, 38, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background: #F2F0EF;
    margin: 5% auto;
    padding: 30px;
    border-radius: 15px;
    width: 90%;
    max-width: 500px;
    position: relative;
    box-shadow: 0 20px 60px rgba(3, 28, 38, 0.3);
}

.close {
    position: absolute;
    right: 20px;
    top: 15px;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    color: #a0aec0;
    transition: color 0.3s ease;
}

.close:hover {
    color: #031c26;
}

.modal h2 {
    margin-bottom: 25px;
    color: #031c26;
    font-size: 1.5rem;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #031c26;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #247c6d;
}

.form-group input[readonly] {
    background: #f7fafc;
    color: #4a5568;
}

.booking-rules {
    background: #e8f4f8;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    border-left: 4px solid #247c6d;
}

.booking-rules h4 {
    margin-bottom: 10px;
    color: #031c26;
    font-size: 1rem;
}

.booking-rules ul {
    margin: 0;
    padding-left: 20px;
}

.booking-rules li {
    margin-bottom: 5px;
    font-size: 0.9rem;
    color: #2d3748;
}

.form-actions {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.btn {
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    flex: 1;
}

.btn-primary {
    background: linear-gradient(135deg, #031c26 0%, #247c6d 100%);
    color: #F2F0EF;
}

.btn-secondary {
    background: #e2e8f0;
    color: #4a5568;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(3, 28, 38, 0.18);
}

/* Loading and Error States */
.loading {
    text-align: center;
    padding: 40px;
    color: #F2F0EF;
}

.error {
    background: #fed7d7;
    color: #c53030;
    padding: 15px;
    border-radius: 8px;
    margin: 20px 0;
    border-left: 4px solid #f56565;
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .room-grid {
        grid-template-columns: 1fr;
    }
    
    .floor-buttons {
        justify-content: center;
    }
    
    .modal-content {
        margin: 10% auto;
        width: 95%;
        padding: 20px;
    }
    
    .form-actions {
        flex-direction: column;
    }
}

footer {
    text-align: center;
    margin-top: 40px;
    color: #F2F0EF;
    opacity: 0.8;
}

footer p {
    margin-bottom: 5px;
}